Application for the Diversion of Southern Water Apparatus

Water Industry Act 1991

325050
A-DEVSRV-S185

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Site Manager’s guide to new water mains and service connections on new developments
Section 185 of The Water Industry Act 1991 places a duty on a statutory undertaker such as Southern Water to alter or relocate any of its apparatus upon receipt of a notice to do so from any person with an interest in land upon which, under which or adjacent to which the public apparatus is installed, providing that the alteration or relocation of the apparatus is necessary to enable that person to carry out a proposed improvement of the land in which he has an interest and that it is reasonable to do so. No such duty arises where the apparatus is located in, under or over any street.

Where the undertaker carries out any work under section 185 by virtue of a notice having been served, the undertaker shall be entitled to recover any expenses reasonably incurred in carrying out those works from the person who served the notice.

You should read the following notes carefully prior to serving notice on Southern Water to relocate any of its apparatus.You must ensure that any project managers, consultants or contractors acting upon your behalf are aware of the costs, requirements and timings associated with diversionary works and that sufficient time has been allowed for the completion of the diversion prior to your starting to build on site.
Health and Safety

Construction Design and Management (CDM) Regulations 2007

Under the CDM Regulations 2007, the developer has client responsibilities for the new mains and services construction on your site, these include:
  • Select and appoint a competent CDM coordinator where the works are notifiable under the Regulations.
  • Select and appoint a competent principal contractor
  • Verify the sufficiency of the construction phase plan prior to commencement
  • Verify that suitable welfare facilities are in place prior to commencement
Water mains
Key Points
  • Hold pre-commencement meeting with a Southern Water representative prior to any new mains work starting
  • The line of the main is clear from obstructions, the roads and footways are clearly marked, and the line and levels are clearly defined
  • Ensure fire hydrants and other street furniture is accessible and free from obstructions and damage
Pre-commencement meeting
Before the construction of the new water main commences the developer will arrange a pre-commencement site meeting. This meeting should be attended by a Southern Water representative, our contractor and the developer, (and, if appropriate, a representative from the self-lay organisation).
At the meeting the following will be discussed:
  • A commencement date to start the mains construction
  • The kerb line and levels will be marked clearly by the construction start date
  • The line and level of the back of any footpath or service strip are to be marked clearly
  • A designated area for the storage of pipes and fittings so that delivery can be arranged
  • Exchange relevant health and safety and CDM information
  • Confirmation of phases / construction visits to complete construction of the main laying; see T&C’s.
  • That no changes have been made to the site layout since the mains design drawing was drawn up
  • The line and level of other utility services in the vicinity of the water mains or service pipes have been considered to ensure there is no conflict and will be in accordance with National Joint Utilities Group (NJUG) guidelines.
  • Service connection types and confirmation of boundary box positions
  • Any other site specific information
Site preparation and commencement of main laying
Before construction of the new main starts it is important that:
  • The proposed line of the main is clearly free from obstructions.
  • A kerb race or other permanent identification of the limits of the roads or footpaths is in place
  • The line and level to the back edge of the footpaths and service strips are clearly defined
All people working for Southern Water and our contractor will be given a site induction by the developer immediately upon arrival on site. They will also be required to sign in and out at the site office each day they are on site.
Where possible, water mains will be constructed with a minimum cover of 750mm from the top of the main to the finished surface level, and 690mm from the centre of the main to the kerb face, in accordance with the National Joint Utilities Group (NJUG) guidelines, (as amended by Southern Water on the positioning and colour coding of utilities’ apparatus).
Service pipe road crossing ducts should be installed by the developer in the positions shown on the design drawing. They should be sized appropriately and at a depth of 750mm below the finished service level and at right angles to the main. Indicative sizes are provided on the Southern Water design drawing. The position of the ducts must be clearly marked at both ends.
The developer will be responsible for ensuring that all chambers, where installed, are vertical and frames and covers are at the correct level to meet the finished surface levels.
Any damage to the water mains and associated fittings will be repaired by the Southern Water and recharged to the responsible party.
To enable future maintenance, a minimum clearance of 300mm must be maintained where any works or services are installed adjacent to a water main. The developer will be recharged for any diversionary works where this cannot be achieved.
Post construction handover
Once any section of the new water main is commissioned, Southern Water or our contractor will walk the line of the new main to ensure that:
  • Fittings have been installed as per the design drawing
  • Fittings are in chambers set to finish levels given
  • Correct covers are fitted
  • Correct marker posts are installed
Site completion sign off
When all permanent surfaces are fully completed, a site walk over will be required by Southern Water with the developer. Any defects identified at this point will be charged to the developer.
The developer must contact Southern Water to arrange a site meeting.
Flushing of mains
When the developer’s build program results in the number of new services connected not producing sufficient demand and turn-over of water within the main, Southern Water will undertake routine flushing to maintain a satisfactory level of water quality. The developer can be recharged for additional routine flushing for this reason.
Temporary building supplies
1  Connection to main
All temporary standpipes and welfare facilities must comply with the Water Supply (Water Fittings) Regulations 1999. When the temporary building supply is no longer required, Southern Water must be contacted to arrange for the supply to be disconnected.
All standpipes and / or taps, that a hose may be connected to, must be fitted with a double check valve.
In some cases a permanent house connection may be used initially for building purposes.
2  Standpipes
Unauthorised use of a fire hydrant / washouts is an offence under section 174 of the Water Industry Act 1991. In order to avoid the risk of legal proceedings please contact Supply UK Water Services who handle applications for the hire of standpipes within the Southern Water area.

Contact Details
Telephone: 0844 984 2788
Email: southernwater@supplyuk.net
Interference with fire hydrants / washouts can result in:
  • Contamination of the water network
  • Damage to fire hydrants & washouts
  • Discolouration of the water network
  • Burst mains due to pressure surges
  • Reduction in pressure of the water network
  • Interruption to supply to surrounding properties
Fire hydrants on new watermains
When designing new water mains Southern Water will liaise with the Fire Authorities regarding the provision of fire hydrants, and will install new fire hydrants where requested by the Fire Authority.

Fire hydrants are life saving devices so it is important that once the new water main is commissioned:
  • Site access is made available to fire service personnel so that the new fire hydrants can be inspected and adopted by the Fire Authority
  • The new fire hydrants are kept free and are not covered or obstructed as they must be accessible in the event of a fire during the construction of the development
  • When constructing footpaths and other final surfaces, the correct fire hydrant cover is installed, the fire hydrant marker post is in position, and the fire hydrant cover is to finished surface level and not buried
  • Fire hydrant chambers are free of debris and surfacing materials and the cover can be removed
Service connections
Key Points
  • It is the developer’s responsibility to lay the service pipes from the building to the highway boundary of the property
  • All service pipes to be installed to comply with Water Supply (Water Fittings) Regulations 1999 and Water Supply (Water Quality) Regulations 2000 (including Regulation 31). All materials to be WRAS approved for use on potable water supplies
  • Service pipes shall be installed at a minimum of 750mm depth
  • Ducts to be provided for any services where the main is on the opposite side of the road
  • Where any part of the site is contaminated appropriate pipe systems must be installed as agreed with Southern Water e.g. barrier pipe
  • Service pipes are capped and labelled to show which plot they supply
  • The pipe must be ducted where it enters the building so that the pipe can be easily retracted and replaced
  • An internal stop tap must be installed prior to service connections being made
  • Service pipes should be laid in straight runs and should not cross neighbouring plots. Service pipes should not run down the public footpath or highway.
  • Ensure area is clear from obstructions before requesting connections
  • Inform Southern Water of all occupants’ details and date of occupancy
When the developer contacts us to request services connections, they should make sure:
  • Payment for the services have been made
  • The service pipe from the property to the boundary is in place and complies with the specification above and the Water Supply (Water Fittings) Regulations 1999
  • The service pipe is clearly marked as to which property it supplies and is sealed to avoid contamination
  • Area around the service connection is free from obstructions such as skips, scaffold and building materials
  • Where the service connection crosses site roads, the ends of the ducts are exposed and marked
  • The finished kerb line and levels are known
  • Boundary boxes should not be in driveways or on vehicle crossovers
When all the above have been met the developer should contact us to request a Trench Inspection.
Chlorination of service pipes
Where a supply pipe is 63mm OD or greater, the developer is required to submit a 'Bacteriological Certificate' prior to the connection with the water main. This should include all internal and external pipework and fire fighting supplies.
Post service connection damage
Any damage caused to meter boxes after they have been connected will be repaired or replaced by Southern Water and the full cost of the work will be charged to the developer.
Water services in contaminated ground
If the site has been deemed as contaminated, the service pipes installed by the developer must be in either WRAS approved barrier pipe (preferred option) or plastic coated underground copper.
Manifold connections
If any of the service connections on site are to be made using two or six way manifolds, the service connections for all of the properties served by each manifold must be requested at the same time and they must all be ready to be connected in one visit.
Occupancy of new properties
The developer will be charged for any standing charges and water consumption until Southern Water is informed of the new occupant’s details.

When notifying Southern Water of a new occupant the following information will be required:
  • Plot number
  • Occupier’s name
  • Full postal address of property
  • Date of occupancy
  • Occupier’s previous address
  • Meter serial number and reading

For terms and conditions click here
Diversion of public sewers S185 - Water Industry Act 1991
Section 185 of The Water Industry Act 1991 places a duty on a statutory undertaker such as Southern Water to alter or relocate any of its apparatus upon receipt of a notice to do so from any person with an interest in land upon which, under which or adjacent to which the public apparatus is installed, providing that the alteration or relocation of the apparatus is necessary to enable that person to carry out a proposed improvement of the land in which he has an interest and that it is reasonable to do so. No such duty arises where the apparatus is located in, under or over any street.

Where the undertaker carries out any work under section 185 by virtue of a notice having been served, the undertaker shall be entitled to recover any expenses reasonably incurred in carrying out those works from the person who served the notice.

You should read the following carefully prior to serving notice on Southern Water to relocate any of its apparatus.You must ensure that any project managers, consultants or contractors acting upon your behalf are aware of the costs, requirements and timings associated with diversionary works and that sufficient time has been allowed for the completion of the diversion prior to your starting to build on site.

Building over public sewers on new development or redevelopment sites is not permitted.

1. Who will carry out the work?
Southern Water will design and supervise the diversion and employ the contractor to carry out the works when:
  • The route of the diverted sewer passes through third party land, and/or
  • The sewer to be diverted is a critical sewer (this includes all rising mains) or there are specific operational requirements
  • The sewer to be diverted is a bonded asbestos cement pipe. This includes pipes described as asbestos cement (AC) and fibre reinforced cement (FRC)

However, Southern Water may permit the developer to carry out the work providing that:

  • The apparatus to be diverted is categorised as non-critical, and
  • The route of the diversion remains entirely within the boundary of the developers’ land. The legal and financial arrangements will differ depending upon whether it is Southern Water or the developer who is carrying out the works.

2. Legal and financial arrangements
When Southern water carry out the works
(Southern Water Diversion)
The diversion will have to be supported by an agreement. Fees will be invoiced directly to the developer or his agent and are not included in the fees or percentages detailed below. Copies of a typical agreement may be obtained by writing directly to them at the address given at the end of these guidance notes.
Southern Water will also recover all its reasonable costs in respect of administration, design, supervision, compensation and construction and will require a cash sum equal to the total estimated cost of the work to be deposited with the company at the same time as the diversion agreement is signed and prior to the commencement of any works on site.
When a developer carries out the works
(Developer diversion S104/185)
The diversion will again need to be supported by an agreement. Fees will be invoiced directly to the developer or his agent and are not included in the fees or percentages detailed below. However, in this case there will be a slightly amended standard agreement to take into account the different financial arrangements.
In this case a refundable cash sum equal to the estimated cost of construction will have to be deposited with Southern Water.
3. What will it cost?
For all applications an initial fee, as per the application form, will be required.
Southern Water diversion

We will provide a budget estimate for the cost of diverting the sewer.

In addition to the above we will require the following drawings.

  • A 1:1250 site location plan
  • A drainage layout plan (where applicable) to a scale of not less than 1:500 showing.
  1. Site boundary clearly marked in green.
  2. Clearly defined plot boundaries.
  3. Location of sewer to be diverted and your suggested route for the diverted sewer.
  4. Layout of any foul and surface water sewers to be offered for adoption under a Section 104 agreement.

You should forward all relevant information concerning the site to enable the estimate to be produced. Any subsequent requests for additional or alternative routes or revised estimates will be subject to further charges.

Upon receipt of the initial fee, we will consider the options and inform you within 30 working days if a sewer diversion is possible and the likely costs involved.

We would draw your attention to the preliminary nature of this initial estimate, which may alter significantly, after the detailed survey and design have been completed.

If a diversion is possible you will be able to enter into a sewer diversion agreement with Southern Water.

A deposit will be required to carry out the design (this sum will be deducted from the cash sum required upon the signing of the diversion agreement). Upon receipt of the deposit we will commence the detailed design and prepare the final estimate. The terms for the agreement will be forwarded to you within 55 working days from the receipt of the deposit. This period may need to be extended if land negotiation prove to be complicated and or the diversion itself complex.

The offer will be open for acceptance for three months.

Developer diversion
Where the route of the diversion will remain entirely within the development site boundary and the sewer is classified as non-critical, Southern Water will allow your consultants to design the diversion and for your contractor to carry out the works. The design should be carried out as per the specification contained in the current issue of Sewers for Adoption – a design and construction guide for developers.

The design drawings will need to be sent to this office for vetting in a similar manner to a Section 104 Water Industry Act 1991 adoption together with the initial fee.

The vetting and administration fee will be estimated on a time-related basis (minimum of eight hours) less the initial application fee.

The supervision fee will be 2.5% of the construction cost. Both the vetting and administration and the supervision fees will be payable prior to any instructions being given to our legal department for the preparation of the agreement.

We will require a cash deposit as a surety payment equal to the estimated construction cost of the works which will be payable prior to, or at the same time that the diversion agreement is signed.

Your contractor will carry out the works at no cost to Southern Water and we will refund 80% of the surety payment cash deposit once the works have been substantially completed to our satisfaction. The remaining 20% plus any accrued interest will be refunded 12 months following the substantial completion and making good of any defects.

It should be noted that no works on the public sewerage system will be permitted until the Deed of Grant of Easement is in place, agreement signed, fees paid and surety lodged.
4. Additional requirements
Prior to you commencing any work on site, you must identify the positions and operational status of all laterals connecting to the section of sewer which is to be abandoned.

Should laterals be found you must obtain the written consent and authority of the owner of the lateral to reconnect their property to the new sewer.

You must ensure that the premises served by the lateral continue to be drained with at least equal effectiveness once the works have taken place.

These approvals should be included in your initial submission.

We will also require a method statement detailing how you are intending to deal with existing flows during the course of the works.

Please note: It is not permissible to discharge foul sewerage into road gullies, surface water sewers, ditches, the trench or watercourses. Nor should ground water be discharged into any public sewer or surface water discharged into the foul water system without the express permission of Southern Water.

Buildings should be located at least three metres away from the diverted sewer where the depth from ground level to invert level is less than three metres. In circumstances of greater depth, large diameter sewers, unusual ground profile or material a greater distance may be required.

On completion of the works the redundant section(s) of the existing public sewers will be made safe by removing them from the ground.

Upon being notified of substantial completion of the works the developer shall supply to the company two sets (or more if requested) of operating instructions/ maintenance manuals for any pumping stations associated with the works.

Three full sets of as constructed drawings showing the diversion works and the health and safety file, as may be required by the Construction (Design and Management) Regulations 2015 will also be required.

5. How long will it take?
Southern Water diversion

Whilst we use our best endeavours to keep costs and timing within reasonable bounds, diversions that encroach into third party land have, by their nature, cost and time commitments not applicable to the developers own site work and the applicant must accept this.

One such commitment is the requirement to give Notice where the route of the diverted sewer passes through third party land.

The code of practice associated with the notice to enter onto third party land commits Southern Water to:

  • Make contact with all owners and occupiers.
  • Ascertain whether they have any existing or future development proposals that are likely to be affected by the works.
  • Establish the correct information about the ownership and occupation of the land likely to be affected by the works.
  • Give owners and occupiers information about the proposed programme of the works including the nature, route and timing.
  • Provide the owner and the occupier with a record of the condition of the working area.

The notice period specified for laying a new length of sewer is three months.

As can be seen from the above and from the timings given previously in this document the average time to complete a sewer diversion is seven to eight months.

You should make allowance for this when programming your site works.

Developer diversion

You should provide all the information detailed in these guidance notes, as it is upon this that the estimate will be based. Any subsequent requests for additional or alternative routes or revised estimates will be subject to further charges.

Upon receipt of this information we will consider the options and inform you within 28 days if your proposals are acceptable. At the same time we will provide you with our estimate of the cost of the works (if different from your own) and the fees that will be required.

You should be aware that any deviation from the standard form of agreement may affect the works programme and anticipated costs.

Please note:All legal fees will be separately invoiced by Southern Water’s solicitor and must be paid before the agreement is engrossed.

Please check your site is in the Southern Water supply/catchment area: https://www.southernwater.co.uk/your-area

Contact details:

Information to be provided for The Application of the Diversion of Southern Water Assets S185, Water Industry Act 1991

1. If the diversion is required to facilitate the erection of a new premise has planning approval been acquired?
2. Has an alternative design been considered in order to mitigate the need to divert Southern Water's existing asset? *
3. Is the whole of the proposed diversion to be undertaken in Highway Controlled Land? *
4. Is any part of the proposed diversion to be undertaken in Private Land? *
5. Is there a chemical soil analysis report? *
(Southern Water may require a soil analysis report to be prepared at your expense)
6. Do you have details of existing Utility Information on or adjacent to the site? *
7. Have you consulted all relevant parties relating to Archaeological and Environmental issues? *
8. Is there any additional information, which may be relevant to Southern Water's diversionary work either on or off site? *
  • Copy of the existing wayleave / easement agreement (if available)
  • An electronic copy of your proposed drawing in a DWG format is required. This must be compatible with AutoCAD
  • A pdf plan highlighting the length of main you would like to divert & the location you would like it moved to if you have a preference.
  • A site plan: Development Site edged in green (1:2500)
  • Soil analysis report

  • Site boundary clearly shown
  • Roads clearly shown
  • Adjacent buildings clearly shown
  • Private pipe run to Southern Water network clearly shown
  • Maximum file limit is 50MB
  • Allowed file types are DOCX, DOC, PDF, XLS, XLSX, JPG, JPEG, BMP, PNG, DWG (auto cad), DXF (auto cad), DGN (microstation), PRP (microstation), PRW (microstation)
Warning! File size too big. Maximum file size 50MB.
Failure to include any of the requested information will be deemed as an incomplete application and may result in this application being delayed/returned. This application DOES NOT mean approval has been granted. No work should commence until written approval has been given by Southern Water.
The contents of the report are for direct use only by the applicant and are to be kept private and confidential. They may only be disclosed to third parties with the written approval of Southern Water. Such third parties to have no subsequent implied or other right to disclose the contents and information to any other parties.
Amount to pay
Diversion of water
£ 1450.00
VAT (20%)
£ 290.00
Total Fee
£ 1740.00
Amount to pay
Diversion of sewer
£ 1850.00
VAT (20%)
£ 370.00
Total Fee
£ 2220.00
Do you require a VAT receipt?: *
Preferred payment method:
Application number:
Amount to pay: £

Payments can be made directly via BACS transfer to:

Southern Water Services Ltd
Miscellaneous Income Account
HSBC Bank Plc
P O Box 125, 2nd Floor, 62-76 Park Street,
SE1 9DZ, London, England

Sort Code - 40-02-50
Account No - 81426834


(However please ensure that you confirm the application number you are making payment for in the reference line)

Please make cheques payable to Southern Water Services Ltd.
Your printed slip and cheque should then be sent to:

Miscellaneous Income
Southern Water
PO Box 4056
Worthing
BN13 3XX



Please click on ‘Print Preview’ and confirm your cheque number is on the preview slip.
Please print the slip and attach the cheque after writing the application number on the back in case they are separated.

Please ensure that you have included the following items with this application:

Copy of the existing wayleave / easement agreement (if available)
Soil analysis report
An electronic copy of your proposed drawing in a DWG format is required. This must be compatible with AutoCAD
A site plan: Development Site edged in green (1:2500)
Third party land owner information (if applicable)
A pdf plan highlighting the length of main you would like to divert & the location you would like it moved to if you have a preference.

Please note:

• Failure to complete this application in full and provide relevant information will result in the application being delayed or returned.
• This application DOES NOT mean approval has been granted.
• No work should commence until written approval has been given by Southern Water.
• We do not accept any drawings unless they have been provided in full size and in paper format.

I/we hereby request diversion of Southern Water asset(s) under Section 185 of the Water Industry Act 1991 at the new development site detailed above and edged green on the attached 1:2500 Ordnance Survey extract.

I/we undertake to pay Southern Water reasonable costs incurred in implementing the diversion scheme. Please note, by signing this application you are not automatically granted technical approval or guaranteed adoption

All works to comply with Sewers for Adoption 6th edition and the interim technical addendum no.1, or Sewers for Adoption 7th Edition.

Failure to complete this application in full and provide relevant information will result in the application being returned and/or refused By signing this application you are not automatically granted permission to connect.

Under no circumstances must any person enter the public sewerage system without the express permission of Southern Water.


I confirm to the best of my knowledge the information I have supplied I complete and correct.

*